Improvement in wrenches



Parar raten.

VILLIS D. GOLD, OF PHILADELPHIA, PENNSYLVANIA.

I IMPROVEMENT IN WRENCHES.

Specification forming part ofhLctters Patent No. 58,633, dated October' 9, i866.

To all whom. it may concern.-

Be it known that I, WILLIS D. GOLD, of the city and county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in lVrenches; and I do hereby declare the following to be a full, clear, and eX- act description of the same, reference being had to the accom panyi n g drawing, which represents a side view of a wrench constructed as hereinafter more fully described, and illustrating my invention.

My invention relates to that class of wrenches for loosing bolts, nuts, 85o., in which the ordinary ledge on the sleeve or the handle and the thumb-screw for operating the movable jaw are dispensed with; and it consists in so arranging the said jaw with a serrated shank that the inner Lipper edge ot' the jaw will gripe or bind in against the serrations when pressure is applied, and the jaw he lrmly held in position against the opposite side ofthe shank, heilig immediatelyv operated by the hand.

-To enable others skilled in the art to which my invention relates to fully understand and use the same, I will proceed to describe it.

A represents the wrench made on the plan of my invention. B is the handle, and C the shank. The tang ofthe shank runs through the handle, and is secured at the lower end by a nut, c, the ferrule d being placed as usually.

Dis the stationary or xed jaw, cast or made in one piece with the shank. By preference it is made separately, and secured thereto by rivet or screws.

E is the movable jaw, which is slotted to slide in the shank C. F is a tooth attached to this jaw.

A spring, t', is fitted in a recess in the rear of the jaw, and presses against thearm of the tooth, the tooth moving in another recess, as fully shown in the drawing. I make no claim to this tooth, however.

a are serrations cut on the back side of the shank or cast on a metal plate, and then properly secured to the shank. The shank is rectangular in form, the slot in the jaw being of corresponding shape. A shoulder, b, prevents the jaw from having too much play or slipping on the handle.

The spring retains the jaw, when placed in position as desired, until pressure of the resistance of the nut against the jaw brings thisjaw firmly in againstthe shank. It is evident that the greater the resistance the greater will be the hold or gripe of the jaw.

I make all metal parts of cast malleable iron,

by preference; but any suitable metal can be used. I prefer the peculiar t'orm of the shank, for the great pressure brought to bear on it requires it strong, and this is secured by having the shank wide in the direction of the jaw, and it is unnecessary to have the entire shank of quadrilateral form; besides it is a matter of economy, since cheapness and convenience of use enter the manufacture of my wrench. y The operation is as follows: The jaw E is moved to a suitable distance after releasing the spring F, and the two jaws made to grasp the nut or bolt head. 'Ihcjaw is moved up as closely as possible or convenient, and the spring-tooth will retain it in position. Power being applied, the resistance of the nut or bolt will press the jaws apart, and the upper inner ends,f, of the rea-r of the jaw E will gripe in the serrations, and be as a fulcrum, while the lower inner end, g, of the front part otl the jaw will be forced or pressed against the shank and be firmly retained in place, and the greater the pressure the greater will be the hold.

' I thus make a simple, cheap, and convenient tool, which will readily answer all the purpose of the screw-wrench, and willperform the work in a quicker manner, as it is easily applied and released. l

I make no particular form of the jaws D E further than described. I prefer to make the xed jaw and shank separately, for convenience in slipping or passing the jaw over the latter, and then I secure the two parts atten ward by rivets.

I make no claim to the shank with the serrations cast thereon, for they can be dispensed with and the side of the shank be cast smooth. The spring-tooth, however, presses in the serrations and holds the movable jaw in position (until pressure is applied) better than without them, and I make no claim therefor. y

Having thus described myinvcntion, what I claim as new, and Patent, is

The arrangemen ver F, in combination with the movable jaw E, operating with 1n the manner and scribed.

desire to secure by Letters To the above specification of improvement in Wrenches I hzwe signed my hand this 28th t of the spring-toothed 1edny of May, 1866.

WILLIS D. GOLD.

Witnesses:

C. MGOARTHY, s W. H. THOMAS.

the rectangular shank C, i for the purpose herein de- 

